The short answer
Buy the Timemore Black Mirror Basic Plus if you want one compact scale with an automatic timer for espresso and pour-over. Buy the Acaia Pearl if you brew pour-over daily and want a larger platform with a 20 ms response.
Side by side
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Quick picks
The answer first. Tap any row to jump to the full reasoning for that pick.
1. Choose this for pour-over precision
Acaia Pearl
Upper-mid tier · A brewing scale with a large platform, built for pour-over and batch brewing.
A 20 ms response on a large platform, built for manual brewing.
The Pearl weighs up to 2 kg at 0.1 g resolution with a listed 20 ms response, on a large platform built for manual brewing at home and in shops.
A fast response matters when you pour: the reading keeps up with the water, so what you see is what is in the dripper rather than what was there a moment ago.
Its large platform suits pour-over and batch brewing, with a carafe and dripper on top.
It is the premium option. The Pearl vs Lunar comparison covers Acaia's espresso-sized alternative.
Specification
- Capacity
- 2 kg
- Resolution
- 0.1 g
- Response
- 20 ms
- Built for
- Manual brewing, home and shop
What it does well
- Big enough platform to sit a Chemex or a dripper and server on
- Fast and stable enough to pour against in real time
- Flow-rate display turns pouring into something you can measure
Where it gives ground
- Not waterproof - that is what the Lunar is for
- Too large to sit on most espresso drip trays
- Costs several times what a competent scale costs
Skip it if
Skip it if you mainly weigh espresso shots on a drip tray. A compact scale suits that better.
2. Choose this for auto-timing and value
Timemore Black Mirror Basic Plus
Mid tier · A rechargeable coffee scale with auto-timing and a flow-rate readout.
0.1 g, an automatic timer and a compact 152 x 130 mm platform.
The Black Mirror Basic Plus weighs up to 2000 g at 0.1 g resolution, with a 0.5 g minimum detectable weight, an automatic timer, and a 1600 mAh USB-C battery rated for up to 10 hours.
The automatic timer starts when brewing begins, so weight and time line up without pressing a button mid-pour.
At 152 x 130 x 26 mm and about 380 g, it is compact enough to suit more espresso setups than a large brewing scale.
It covers espresso and pour-over well enough that most home brewers never need anything more.
Specification
- Capacity
- 2000 g
- Resolution
- 0.1 g; minimum detectable 0.5 g
- Timer
- Automatic timing
- Battery
- 1600 mAh, up to 10 hours, USB-C
- Size
- 152 x 130 x 26 mm, about 380 g
What it does well
- Auto-timing and flow rate at a fraction of an Acaia
- USB-C rechargeable rather than a drawer full of coin cells
- Small enough for a drip tray, big enough for a dripper
Where it gives ground
- Not waterproof
- Response is quick but not espresso-instant
- The mirrored top shows every fingerprint
Skip it if
Skip it if you brew large batches with a heavy carafe every day and want the fastest response - that is the Pearl's territory.
Is the Acaia Pearl worth it?
For daily pour-over, it can be: a fast response and a large platform make precise pouring easier. For most home brewers, the headline figures - 2 kg and 0.1 g - are the same on the Black Mirror, which is why the Black Mirror is the more common recommendation.
The Pearl is worth it when you use its strengths every day. If you are buying your first scale, start less expensively - see scales under $50.